Wireless telegraphy.



H. SHUEMAKER.

WIRELESS 'TELEGBAPHY. (Application rled Feb. 1, 1901.)

Patented Aug. 6, 190|.

(No Ilodal.)

TH: ohms PETERS co., Novo-nwo. WASHINGTON, u. c,

UNITED STATES PATENT OFFICE.

HARRY SHOEMAKER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO MARIE V. GEHRING, OF SAME PLACE.

WIRELESS TELEGRAPHY.

SPECIFICATION forming part of Letters Patent No. 680,001, dated August 6, 1901.

Application tiled February l, 1901. Serial No. 45,586. (No model.)

, To all whom it may concern:

Beit known that I, HARRY SHOEMAKER, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Wireless Telegraphy, of -which the following is a specication.

This invention relates to improvements in .Wireless telegraphy, and has special reference to a type-writing wireless telegraph, the main object being to provide a device which will print the proper type upon the paper without the use of conductor-Wires.

Another object of my invention is the provision of a type-Writing wireless telegraph which consists of a transmitting-station which is adapted to operate a receiving -station, which has apparatus to print and space, and a winding mechanism for operating a typewheel shaft.

To attain the desired objects, the invention consists of a type-Writing wireless-telegraph system embodying novel features of construction and arrangement of parts, substantially as disclosed herein.

In the drawings, Figure 1 is a small diagramm-atical view of the entire system. Fig. 2 is a detail view of the operating-drum on type-wheel shaft, and Fig. 3 is a detail view` of the coherer and operating mechanism.

Referring by characters to the drawings,the numeral 1 designates the cylinder, provided with grooves 2 and pins 3, said cylinder being provided with a iiy-wheel 4 to be revolved by any well-known power. To stop this cylinder at the proper place-that is, so that the brush 13 is upon a conductor-space 7 of the commutator 6-I employ the type keys and bars 5. 4

made at each contact of the brush with a conductor-block. This eleetromagnet oscillates the lever 16, which conveys the impulses to the induction-coil 17 in circuit with the air and ground plates Aand G. This apparatus constitutes the transmitting-station of my type-writing wireless-telegraph system. As the commutator is revolved impulses are caused to energize the electromagnet 14, which in turn opens and closesthe coils circuit, said coil causing ether or Hertzian Waves to be transmitted to the receiving apparatus hereinafter fullylset forth and described.

The receiving-station consists of the air and ground plates A and G', connected in circuit with the coherer 2l. By means of the batteries 36 the centrally-pivoted armature 23 is oscillated as a current is sent through the electromagnets 24, thus causing the coherer to oscillate, a pin 26 limiting the vmovement of the armature and the spring 27 assisting in the return of the armature between the impulses. VVlienan impulse is received, the electromagnet 28 attracts the lever 29, which makes a circuit through the wires 30, magnets 24, wire 31, electromagnet 32, wire 33, electromagnet 34, wire 35, batteries 36, and Wire 37, the electromagnet 34 operating the lever 38 and the electromagnet 32 operating its lever 39. When the lever 29 is returned by its spring 29, it contacts the post `40, as the electromagnet 28 has become demagnetized by reason of the keys being released and the` coherer-circuit being open, makinga circuit through wire 41 with the electromagnet 42, which causes the spacinglever 38 to be attracted toward it, completing its circuit through wire 35, batteries 36, Wire 37, and the lever 29. The spring 39a of the lever 39 returns the lever and causes it to contact the post 43 when this last circuit is made, and another circuit is made through the wires 44, electromagnet 44a, wire 45, electromagnet 46, and batteries 47, its usebeing stated fully hereinafter.

A shaft 48 has mounted thereon a typewheel 49, a drum 50, and a cog-wheel 50, e said drum being provided with the stepped pins or stops 51, projecting from the inner surfaces of the flanges and arranged alternately one on each ii'ange.. These pins are' adapted tobe contacted by the free end of the lever 38 to stop the wheel at Vthe proper place. As the impulse at first energizes the magnet 34, causing the lever 38 to be drawn toward it, causing the lever to disengage one of said pins upon the opposite flange and engage the proper pin upon the other ange, the drum is turned the distance between one pin on one side and the other pin on the other side. At this point the lever 29 contacts the post 40, causing the magnet 42 to be energized. This magnet, attracts the lever, releasing the pin just engaged and causing it to engage the proper pin upon the other flange.

respectively, in magnets 34 and 42, causing the drum to be moved two spaces.

Y Mounted upon a shaft 32 is a large springactuated drum or wheel 52a, which is geared to the cog-wheel a and is adapted to revolve the type-wheel shaft. ot this wheel 52 is a pin 53, which is adapted to everyrevolution thereof engage or contact the spring-plate 54, causing a circuit with the batteries and axle of the wheel to operate the motor 55 to wind the spring of the drum 52a, which is geared to said motor.

The electromagnet 44a, which is in circuit with the wires 44 and 45, electromagnet 46,

`the batteries 60, wire 6 1, electrmagnet V58,

` and wire 62, said electromagnet 58 attracting the paper-spacing lever 63, whose dog or detent 64 engages the ratchet-wheel 65 and revolves the feed-wheel 66, which causes vthe e. paper 67 to be passed between the printinglever 56 and the type on the wheel 49, so that the message may be read.

An Aimportant device contained in this apparatus vis the device for operating the shaft carrying the type-wheel, as I employ two electromagncts operated by two circuits to operate the lever 38, which'is caused to move f from one magnet to the other as the circuits are made yone after the other, the shaft being Y revolved by the spring-actuated drumv two tween the commutator and type-wheel, andi 'lhus it will be seen that one'impulse from the commutator causes two impulses, Y

Upon the outer face as theproper key is pressed upon thecylinder and com muta-tor are stopped, they d uring the remainder of the time being constantly revolved by any desired power. As the commutator is revolved the ether waves transmitted are received by the Vair and ground plates of the receiving apparatus, and after the coherer has been operated by the waves it loses its resistance and, in eltect,closes the circuit. The magnet 28 is then energized and attracts the lever 29, which makes a circuit to oscillate the coherer and the magnet 34, and when the lever 29 is released, the magnet 28 becoming demagnetized, a circuit is made through post 40 and batteries 37 to energize `the magnet 42, the magnet 34 having been energized before the magnet 28 was demagnetized. When the lever 38 is attracted bythe magnet 42, one of the pins of the wheel 50 is engaged and the type-wheel is brought to a full stop. The magnet 32, which was magnetized when the magnet 34 was magnetized,is demagnetized at this point, and the spring of the lever 39 causes said lever .to contact the post 43,'making a circuit through magnet 44, Vwire 45,l magnet 46, and batteries 47. The magnet 44a being magnetized attracts the printing-lever and causes it to press the paper against the proper type ofthe type-wheel, and when the type-key just pressed upon is released the electromagnet 46 is demagnetized, releasing the lever 57, which by reason of its spring causes a circuit to be made through batteries 60, wire 6l, magnet 58, and wire 62, said magnet being magnetized to attract lever 63, which causes the paper to be fed after the printing operation. The lever 39 is normally held against the magnet 32, which slightly holds over, as the impulses are so rapid and the spring 39a so weak, thus not allowing the printing and paper? spacing mechanisms to be operated until the key is pressed at the transmitting-station'. When the key is held down suciently long, the magnet 32 becomes demagnetized, allowing the spring to operate the lever 39 to make the proper connection to operate the printing and paper-spacing mechanisms.

By a'simple device upon the motor-wheel 52 amotor is operated to wind the wheel, thus insuring the winding of said drum, so

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that it will always revolve the shaft 48 at the y proper time. I -It is evident that I provide a practical typewriting wireless-telegraph system which is very simple in its construction and arrangethe type-wheel at the proper place, means for pressing the paper against the proper type and means for spacing the paper.

2. A type-writing wireless telegraph comprising a transmitting apparatus consisting ofa commutator, means for revolving said commutator, a relay-circuit operated by said commutator and a circuit having an induction-coil operated by said relay-circuit; and a receiving apparatus consisting of air and ground plates, animperfect electrical contact, means for operating a type-wheel, means for printing and means for spacing the paper operated by the influence of the oscillations received by the contact.

3. A type-Writing wireless telegraph comprising a transmitting apparatus consisting of a keyboard, a cylinder and a commutator mounted upon a common shaft, means to revolve the same, a circuit in electrical connection with said commutator and an inductioncoil circuit operated by said first-mentioned circuit; and a receiving apparatus consisting of air and ground plates, an imperfect electrical contact, a type-wheel operated simultaneously with the commutator and adapted to stop at the proper place when the commutator is stopped, means for causing the typewheel to print and means to space the paper, all being operated by the influence of the impulses sent by the transmitting apparatus and received by the contact.

4. A type-writing Wireless telegraph comprising a transmitting apparatus consisting of a cylinder and a commutator upon a common shaft, means to stop the same, means to revolve the same and an electromagnetic circuit operated by said commutator, another circuit operated by said rst-mentioned circuit, and a spark-producer in said last-mentioned circuit; and a receiving apparatus consisting of a coherer and an electromagnet in circuit therewith, means for operating a type-wheel, means for printing and means for spacing, all operated by said electromagnet.

5. A type-writing wireless telegraph comprisin g a transmitting apparatus and a receiving apparatus, said receiving apparatus consisting of air and ground plates, a coherer connected therewith, a relay-circuit connected therewith, a circuit for oscillating the coherer operated as the relay-circuit is magnetized and demagnetized, means for stopping the type-wheel at the proper time, means for printing and means for spacing the paper, all of which are controlled through dierentcircuits by said relay.

6. A type-writing wireless telegraph comprising a transmitting and a receiving apparatus; said receivingapparatus consisting of an oscillated coherer, 'a relay-circuit connected therewith, means for operating a typewheel, means for printing and means for spacing the paper controlled by said relay-circuit.

7'. A type-writing wireless telegraph comprisin g a transmitting and receiving appara` tus, said receiving apparatus consisting of a coherer, a relay-circuit in circuit with said coherer, electromagnets adapted to be energized by said relay-circuit, and a spring to oscillate said coherer, and separate means for operating a type-wheel for printing and for spacing paper operated by said relay-circuit.

8. A'receiving apparatus for a type-writing wireless-telegraph system comprising an imperfect electrical contact, a relay-circuit connected to said contact, means for oscillating said coherer operated as the relay-circuit is magnetized and demagnetized, means operated after the contact gains its resistance to print and means to space the paper after the printing operation.

9. A receiver for a type-writing wirelesstelegraph system comprising an imperfect electrical contact, means for oscillating the same after the contact loses its resistance, a relay-circuit connected with said contact, a pair of electromagnets adapted to be energized one at a time as said relay-circuit is energized and denergized, a type-wheel operated by said pair of magnets and an electromagnetcally-operated means for printing and an electromagnetic means for spacing the paper, all controlled by said relay-circuit.

10. A receiving apparatus for type-writing wireless-telegraph systems comprising animperfect electrical contact, a main relay-circuit connected therewith, a pair of electromagnets operated one at a time as the relaycircuit is energized and denergized,a stepped type-wheel, a lever operated by said pair of magnets to allow said type-wheel to be moved one step at a time, an electromagnet'in the same circuit with the pair of magnets, another circuit having therein two electromagnets, a printing means operated by one'of said lastmentioned magnets and a spacing-circuit operated by the other of said last-mentioned magnets.

l1. In a type-writing wireless telegraph, a receiving apparatus comprising an imperfect electrical contact; a relay-circuit connected therewith; means for printing operated by said relay-circuit consisting of a type-wheel, a spring-drum connected with said wheel, means for making an electrical circuit at every revolution of said wheel for operating a motor to Wind the spring, and a lever for pressing the paper against said type-wheel; and means for spacing the paper after the printing operation.

In testimony whereof I aflx my signature inipresence of two witnesses.

HARRY SHOEMAKER.

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